Steam boiler



Oct. 30, 1928.

u. PlSl STEAM BOILER Filed May 1925' Unite ATTORN Y8 U PISI STEAM BOILER Oct. 30, 1928.

-' Fil y e, 1926 6 Sheets-Sheet a Oct. 30, 1928. I

U. PIS] STEAM BOILER Filed May 1925 6 Sheets-Sheet 4 n W J.

,1 A a 1 -Il- -M- xx w-- I I I 1 r r I 1 i U. PISI STEAM BOILER Oct. 30, 1928,

Filed y 6, 1926 6 Sheets-Sheet 5 Oct. 30, 192 8. x

u. PlSl STEAM BOILER.

Filed' May 1935 6 Sheets-Sheet 6 I Undo Pia gwwmlov alto'zmqs Patented Oct. 30, 1928.

UNITED STATES 1,689,966 PATENT oFFlc-n] UNITO rust, or PHILADELPHIA, rnnnsynvemaf STEAM Application filed my s,

This invent-ion relates to boilers such are employed for the generation of steam and has special reference toa boiler of the horizontal tubular type particularly adapted for use as a stationary or marine boiler.

One important object of the invention 'is to provide an improved general construction of boilers of this type.

A secondimportant object of the invention is to provide an improved arrangementof water and fire tubes in a boiler of this class. v o A A third important object of the invention is to provide an improved form of boiler havingan improved arrangement of water.

heating pipes certain of which are arranged in a novel manner to secure preheating of the feed water before it reaches the'steam making part of the boiler.

A. fourth important object of the invention is the provision of a novel and com pact arrangement as will "be hereinafter apparent, the invention consists in general of certain novel details of construction and combinations of parts hereinafter fully described, illustrated in the accompanying drawings and specifically claimed.

In the accompanying drawings like characters of reference indicate like parts in the several views, and:

Figure 1 is a side elevation of the boiler with one side of the housing removed to disclose the interior arrangements.

Figure 2 is a similar view from the top of the boiler. I i

Figure 3 is a front elevation similar to Figure 1,jcertain parts being broken away to show those behind.

Figure 11s an enlarged view of a portion ofthe boiler as shown in Figure 3. I Figure 5 1s an enlarged longitudinal section through a portion of the boiler showing the fire, water and superheater tube arrangementin the steam generating part of the boiler. i i f b Figure 6 is a view showing a part of the feed water heater in side elevation.

Figure 7 is a' view takentransversely of the boiler showing the arrangement of the feedwater headers. V

Figure 8 is a partlal endview 'ofone ofthe steam drums and its water leg.}

of a hollow plug used'herewith.

of superheater tubes in suchaboiler. V V p With the above and other'objects nview is connected to "the boiler.

BoILEn.

1926. Serial No. 107,250.

Figure. 9 is a side elevation .of the parts shown in Figure 8.

Figure 101s a side V ew, partly in section Figure 11 is an enlarged-section on-the line 11'-,11'0f-Fi gure 1.

Figure 12 is a section on the of Figure 11. 7

In the construction of this boiler the feed water pipe 10 leads in from the back of the boiler near the top thereof and after pass-j line 12 12 ing through the boiler housing extends transversely of the housing in a lower or cold feed water header 11 which is closed at the end remote from the pipe" 10. Above'and parallel to this'header is an upper or hot feed water header closed at both ends having a front branch 12 and a rear branch 13; Con

. necting these feed water headers is a series ofbanks offeed water pipes 14 each of substantially U-shape and extending from the lower header well towards the front of the boiler and then bent upwardly and backwardly and connected tothe upper header branch 12' These banks are of difi'erent" lengths asshown.

feed water headerj' and the rear branch '13' the rear water legs by nipples 19. i f i "The circulation so far is from the feed water pipe 10 into the lower header 11 through the heater pipes 14 to the branch 12, then to the branch 13 and from there through'the nipples 19 to the rear Water legs17 to the rear main water header 16. These main water headers are connectedby water tubes '20 and within each tube QOisa. concentric fire tube I and reanbranches 12 and 13 of the upper 21, the ends of which pass clear through the main water headers and openintothe spaces between these headers and theend walls of On the topwof each. steam drum 18 is mountitied a steam valve 22 and across the tops of the drums extends a steam header from the ends of which extend downwardly and rearwardly the steam legs 2% which have their lower ends connected by a lower steam header 25. Through the lowermost row of fire tubes extends a series of superheater tubes 26 concentrically spaced from the inner wallsof said fire tubes and similar superheater tubes 27 runthrough all the remaining fire tubes except the uppermost row. Each vertical row of superheater tubes is connected in pairs, staggered front and rear, by short superheater headers The uppermost row of these superheater tubesis connected to a main steam pipe 29 by which the steam is conducted to any suitable place of use suchas steam turbine or other steam engine.

'. Following the circulation from the rear water legs it will be seen that the water flows down in the rear main water header through the pipesQO to the front main water header, In these pipes and headers the water is heatedby the flame and hot ses from the grate 30 which not only pass up around the outside of the water tubes but throu lr the fire tubes so the thin layer of w aroundthe fire tubes isheated-with great efiiciency and boilsrapidly and passes up the front water legs 17, the tubes being inclined for this purpose, andinto thesteam drums. .From there the steam passes through the steam header and legs and back and forth in an upward direction through the superheater tubes to the main steam pipe 29.

A fire arch 31 is preferably positioned be -low the rear branch 13 to keep the lame and hot gases from impinging directly on the feed water header branches 13 and 12.

Thus, with this boiler steam is produced rapidly and efficiently and the feed water is heated and the steam superheated. Inoases whereit dii'licult toinsert or head certain, of the tubes for the assembling of the device, as forinstance in the feed water headers andother parts I drill holes in the headers opposite-the tube end so that a tube expanding tool can be passedthrough the header and into the tube end. 7 afterwards plugged with a hollow plug 32, with a closed inner end, the plug expanded after insertion by atu-be expanding tool.

It is obvious that minor changes may be made in the formand construction of the invention without departing from the material spirit thereof. It is not, therefore, desired to confine the invention to-the enact form herein shown and described, but it is desiredto inelude all such as properly come within the scope claimed;

Having thus described the invention, what is "claimed as new, is: i

1. In a boiler, a series of water tubes. a series of fire tubes each extending longitudinally through a respective water tube, and a These holes are,

series of superheater tubes each extending long tudinally through a respective fire tube.

2. In a boiler, a series of water tubes, a series of fire tubes each extending longitudinally through a respective water tube, a series of superheatcr tubes each extending longitudinally through a respective fire tube. headers common to all oftho water tubes at each end thereof, and other headers connecting the super-heater tubes in sets the last mentioned tween. said headers, fire tubes each extending through said headers to open attheir remote walls and each passing longitudinally through a respective watertube, and superer tubes connected in series and each passing longitudinally through a respective fire tube. I

4. In a boiler, a pair of spaced water head- I each having a front and a back wall, water tube secured to the proximal wails of said headers l affording communication be tween said headers, fire tubes each extending through said headers to open attheir remote walls and each passing longitudinally through a respective water tube,superheater tubes connected in series and each passing longitudinally.through arespective fire-tube, water legs projecting upwardly from the tops of the water headers, a steam drum carried by water legs and communicating therewith, and means to convey steam from the steam drum to the lowermostends of the series of supcrheater tubes.

In a boiler, a pair of spaced water headers each having a front and. a back wall, water tubes secured to the proximal walls of said headers and affording vcommunication between said headers, fire tubes each extending through said headers to open at their mote walls and each passing longitudinally through a respective water tube, superheater tubes connected in series an d eachpassinq lon gitudinally through a respective fire tube, water legs projecting; upw rdlyfrom the tops of-the water headers, a s am drum carried by said water legs and conununicatiug therewith, means to convey steam from the steam drumto the lowermost ends of the series of superheater tubes, an d means to supply water to one ofsaid water legs including feed water heating elements between the tubes and said drum. v

6. In a boile.r,a pair of spaced water headers each having a front and a back wall, water tubes secured to theproximal walls of said headers and affording eommu.-. ion between said headers, fire tubes each extending throug said headers to open their re mote walls and each passing longitudinally through a respective water tube, superheater tubes connected in series and each passing longitudinally through a respective fire tube,

water legs projecting upwardly trom thetops of the water headers, av steam drum carried by said water legs and communicating there-' with, a steam header extending across the top of said steam drum and having valved communication therewith, steam legs extending downwardly an d'rearwardly from the ends oi. the steam header, and a second steam header extending transversely across the lower part of one of the water headers and having the lower ends of the series of superheater' tubes connected thereto. I

7.- In a boiler, apair of spaced water l1eaders each having a front and a. back wall, water tubes secured to the proximal walls of said headers and aifording communication between said headers,- fire tubes each extending through said headers to open at their remote walls and each passing longitudinally through a respective water tube, superhcater tubes connected in series and each passing longitudinally through a respective fire tube, water legs projecting upwardly from the tops of thewater headers, a steam drum carried by said water legs and communicating there with, a steam header extending across the top of said steam drum and having valved com- V munication therewith, steam legs extending downwardly and rearwardly from the ends of the steam header, a second steam header extendin transversely across the lower part of one o the water headers and having the lower ends of the series of superheater tubes connected thereto, and means to supply water to one of said water legs including feed water heating elements between the tubes and said drum. v 8. In a boiler, a pair of spaced water headers each having a front and a back wall, wa -t ter tubessecured tothe proximal walls of said headers and afi'ording communication between said headers, fire tubes each extending through said headers to open at their remote walls and each passing longitudinally through a respective water tube, superheater tubes connected in seriesand each passing longitudinally through a respective fire tube, water legs projecting upwardly from the tops of the water headers, a steam drumcarried'by said water legs and communicatmg therewith, means to convey steam'from the steam drum tothe lowermost ends of the series of superheater tubes, a cold feed water header extending transversely of the boiler adjacent one end thereof and above said tubes, said feed water header being closed at one end and communicating with a feed water pipe at its other end, a hot feed water header having two communicating branches one of which lies above the cold feed water header I parallel thereto vand the other of which lies on the opposite side of one or said water legs, U-shaped pipes each having its ends connected respectively to the cold feed water header andthe first mentioned branch of the second feed water header, said second header being closed'at both ends, and nipples connecting said second branch with the adjacent'water leg. 9. In a boiler, a pair of spaced water headers each having a front and a back wall, wa ter tubes secured to thepro-ximal walls of said headers and affording communication between said headers, fire tubes each extending through said headers to open'at their remote walls and each passing longitudinally through a respective water tube, superheater tubes connected in seriesand each passing longitudinally through a respective fire tube, water legs-projectin upwardly from the tops of the water heac ers,a steam drum carried by said water legs and communicating therewith, means to convey steam from the steam drum to the lowermost ends of the se ries of superheater tubes, a cold feed water header extending transversely ofthe boiler adjacent one end thereof and above said tubes, said feed water header being closed at one end and communicating with'a feed wa ter pipe at its other end, a hot feed water header having two communicating branches one of which lies above the cold feed water header parallel thereto and the other of which lies on the opposite side of one of said waterv legs, U-shaped pipes each having its ends connected respectively to the cold feed water header and the first mentioned branch of the second feed, water headers, said second header being closed at both ends, nipples connecting said second branch with the adj acent water leg, a steam header extending across the top of said'steam drum and having 1 5' valved communication therewith, steam legs extending downwardly and rearwardly from the ends of the steam header, and a secondsteam header extending transversely across the lower part of one of the water 0 headers and having the lower ends of the se- -ries of superheater tubes connected thereto.

10. In a boiler, a' pair of spaced water headers each having a front and a back wall,

water tubes secured to the proximal walls of adjacent one end thereof and above said 3 tubes, said feed Water-header being closed at one end and communicating with a feed Water pipe at its other end, a hot feed Water header having two coin-innnicating branches one of which lies above the cold feed Water 7 header parallel thereto and the other of Which lies on the opposite side of one of said Water leg-s, U-shaped pipes each having its ends connected respectively to the cold feed Water header and the first mentioned branch of the second feed Water headers, said second header being closed both ends, nipples connecting said secondhranch with the adjacent Water leg, a steamheader extending across the top of said steam drum and having valved communication therewith, steam legs extending downwardly and rearwardly from the ends of the steam header, a second steam header extending transversely across the lower part of one of the .Water headers and having the lower ends of the series of superheater tubes connected thereto, and main steam pipe to which all of the remaining ends of the series of superheater tubes is connected.

In testimony whereof I afiix my signature.

UNITO P181. 

